low-key practice
nounUK /ˌləʊˈkiː ˈpræktɪs/
US /ˌloʊˈkiː ˈpræktɪs/
A quiet and simple way of practicing something without much fuss.
She did some low-key practice on the piano before the big show.
OTHER MEANINGS
2. A practice session kept secret or not announced to others.
The team had a low-key practice before the surprise match.
3. A calm, low-pressure way of learning a skill over time.
His low-key practice with drawing helped him improve without stress.
4. A small, modest habit done regularly without drawing attention.
Daily low-key practice of new words made her reading better.